#include<stdlib.h>
#include<stdio.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<unistd.h>
#include<pwd.h>

int main(int argc,char **argv){

    //  struct passpwd pwd;

     
    struct passwd *pwd = getpwuid(1000);
    printf(" %s \n",pwd->pw_name);



   return 0;
}